tree ed6a28a96717a0c0df963c506f7cf15f42220883
parent 014c16c3e1ccedbea025111bc79f0a0351ba52d0
author Alex Light <allight@google.com> 1572554933 -0700
committer Treehugger Robot <treehugger-gerrit@google.com> 1572560310 +0000

Add DCHECK that Allocation PreFenceVisitors do not suspend

As PreFenceVisitors perform initial setup of objects before they are
fully visible to the GC they should not ever suspend. This adds a
ScopedAssertNoThreadSuspension around calls to the fence in order to
verify (on kIsDebugBuild) that no suspend occurs.

Test: ./test.py --host
Change-Id: I3b073252cf74289da30e1a5ebf4272dcc4c0023f